______ does this scarf belong to— Let me see. Oh, it may be ______.

Tom didn’t give up studying ________________ he failedmany times.

Many of my students, __________ Zhang Hua and Li Yong, are working very hard, and we should learn from them

Do you have________trouble dealing with the problem?—YesIt is________me

The loss has not yet been ______ accurately, but it is believed to be well beyond a hundred million dollars.[ ]